Transmission



v. KlNsx-:R

TRANSMISSION Sept. 4, 1945.`

Filed'Aprl 14, 1945 @IND sept. 4, 1945. y V@ ,UNSER Y 2,383,974

` I I `TRANSMISSION Filed April 14, 194s 2 sheets-sheet 2 Patented Sept. 4, 1945 UNITED STATES PATENT OFFICE v TRANSMISSION Vernon Kinser, Detroit, Application Aprii 14, 1943, serial No. 483,067 volaims. (c1. "J4- 279) -of means whereby the speed changing'elements operate repeatedly between their speed changing 'limits, carrying greatly reduced torque, to effect the desired overall speed changes; the provision of speed changing mechanism, of the kind described, in which torque-transmission is effected to a large extent by gears or other positive drives with a. mere minimum of power being transmitted by the speed changing elements, and, in general to improve the construction of transmissions now being used in tractors, automobiles, other vehicles, and various industrial applications.

And with the above and other objects in view, my invention resides in the novel features of form, construction, arrangement, and combination of parts hereinafter described and pointed out in the claims.

In the accompanying drawings- Figure 1 is a longitudinal sectional view through a variable speed transmission of my invention;

Figures 2, 3, 4 and 5 are transverse sectional views of the unit, taken respectively on the line 2 2, 3 3, 4-4 and 5-5 on Figure 1;

Figure 6 is a fragmentary transverse part sectional view taken approximately at the line 6, Figure 4.

Figure 7 is a sectional view taken approximately along the circumferenceJ-'I, Figure 1;

Figure 8 is a fragmentary sectional view taken approximately along the line 8, Figure i Figure 9 is a, view taken along the circumference of the cam shaft 29 showing a full 360 degrecs: and

Figure 10 is a sectional view taken approximately along the line I 0-I0, Figure l, showing the shifting collar 63, the sleeve 40, and the drive shaft I.

Referring now more in detail and by refer? mission. R'evolvably mounted upon the drive shaft I is the revolvable member or sleeve 5, best seen in Figure'l.

Means are provided for varying the speed of the sleeve 5 with'respec't to the` drive shaft I, preferably, asin this instance, by means of suitable -clutching and braking means whereby the sleeve 5 is alternately either driven by 'the drive shaft I or restrained against rotation. y i

For restraining the sleeve V5 against rotation there is provided asan integral part of the housing A the stationary braking member 6 disposed oppositely with respect to` theclutching member- 3 for purposes now appearing-` Interposed between the clutching member 3 and the braking member 6 is the corresponding pair of complementary friction members'l, '8 being splined to the sleeve 5 and disposed for 'cooperation respectively with the clutching member 3 and the braking'member 6,"all of whic'h'is best seen inl Figure l. Y

Disposed between the friction members 1, 8 is the pair of springs Il, I2 on either side ofa suitable shifting collar 9 which' is splined to the sleeve Sand provided with a circumferential groove'lll. It may be well to here say that the springs Il, I2 are of suitable length 'so as toY permit alternate operation of the friction members 1, 8 by and with the shifting collar 9. i

Provided inthe housing A is the link I3 which includes a pair'of arms I4, I5 being'equipped respectively with the studs I6, I1 disposed for operative engagement with the groove IIJ of the shifting collar 9.1 Included likewiseas part of the link I3 are the arms I8, I9 extending in an opposite direction with' respect to the arms I4, I5 and being swingably connectedto the housing A by means of an integral stud bolt 20. The arm i9 is provided with the cam facesr 26, 21, circumferentially axially disposed with respect to 'the axis of the stud boltf20, and being oppositely disposed with respect4 to'each other, best seen in Figures 2 and '7.

Embracing the stud bolt 20 between'the pair of arms I8, I9 is the sleeve 2| which on one end is provided with an arm 22. The arm 22 terminates in an integral stud 34. Splined to thc sleeve 2| is the cam follower member 23 being equipped with a suitable trunriion 24 upon which is mounted the roller 25 disposed for operative engagement with one or the other of the cam faces 26, 21.

The roller 25 is caused to be yieldingly held against either the cam face 26 or 2'! by means of a suitable compression spring 28 being disshaft I. The spring 28, it will be understood, has

compression enough to |cause the roller 25 being forced againstathe cam face 25.951' .21..to f.operate the sliiftingcbllar i9, for complete@ compressionv of either the spring II or I2.

Similarly, when the roller 25 is in Contact with, the cam face 21 the shifting collar Sowill be caused to compress the spring I2, the springllilY will be released of its tension, the friction mem-k.

ber 8 Will cooperate with the braking member 5, and the sleeve 5 will be effectively restrained 'i against rotation.

Rotatably mounted in the housing cam shaft 29 supported by thebgearings 39V and provided at one rend with a control VWheel, SI. The periphery 0f the cam shaft 29is interrupted to provide a pair of vcircumferential grooves 32, 33, the'y groove 32- beingr-disposedwforoperative engagement'with the stud 34 ofthe .arm 22 ofthe 'link'I3.; `1 f N Thegroove 32, .is disposed .witha profile ar-v ranged to cause.the farm 22 to oscillate for,-in turn, lshifting of the rol-ler 25 from one .of the cam faces 12B or 21' to `the other so that one full turn of fthe control wheel Y3H will cause the roller 25 to be shifted from Zthe cam face21,as shown in Figure v'1,-to thecamvfaceZS at one quarter turn of: the control Wheel SI., then the ro1ler=25 will be shifted .backtothe cam face 21sfat half turni-ofthe4 control wheel'3l; `Atf'ithree quarters turn of .the fcontrolwheel 3 I 'theffroller 25'Will be forced upon thev cam vface .2.5 .and .at one full turn of-:the control Wh-eell the roller 25 isvforced back to the cam face 21.

-It may bewell .to here s.ay-that lsuelr shifting ofthe roller 25'from one, of the-10am faces 2510i' 21 to theotherbythe camshaft29 will'result in a .corresponding movement ofthe shiftingfcollar 9, as has `been hereinbefore set forth;- Sorthat as the. oontrolvfl'ieel 3I fis rotated? the friction members 1, 8 7are alternatelyoperatedfirst, for cooperation offthe friction member B With the braking kmember-6 .for restraining 'the sleeve 5 againstl rotation," athen, vfor f cooperation "of the friction member 1Withfthe clutching'member 3 for unison .speed response of vthesleeve :5 tothe drive 4shaft and so on,- 'foryarying Ithe speedof the sleever-5.- -xvx n Radial-ly.'extendingffromT the sleeve '5 is the-pair of arms 35. each being-fequipped-at their. outer ends with suitablejtrunniorrs Y3.6 .axially disposed withrespectto `the s1eeve;5.; 'Mounted onthe trunnions 36 is the, respective pairs'of planetary pinions 31, 38', 39,the .differentpairs of pinions 31,38, l39 being arranged inicluster -gear fashion or integrally disposed with respectzto'each other, as best seen inFigure i1.

Mounted onfthe=drive shaft .I. is the vpair of revolvable members "or 'sleevesfz 40, v4I..` ""The sleeves 40, 4L-are *respectively rigidly affixed to a pair of sun gearsf42, 43;by means of the keys 92,-93, respectively; and .are disposed for operative lengagement respectively with ithe' planetary pinions38, 39. VThe planetary pinions 31 are in meshing engagement with the sun gear 2. i

yPower is transmitted from ;.the:` sleeveV 5 .and the drive `shafts-I 'to the'xsleeves 410,4fi1by means of the -ygzlanetaryy gearing arrangement which in'- cludes the sun gears 2, 42, 43 and the planetary pinions 31, 38, 39. Referring to Figure l it Will be noted that the planetary pinions 38 are smaller than the planetary pinions 31, While the planetary pinions 39 are larger than the planetary pinions 31. Because of this diiference in size or pitch line diameter of the planetary pinions 31, 38, 39, will result in a corresponding difference in size of the'sun gears 2, 42, 43,

BefuSef-Ofssuh dellfill daiifeters. ef plane.. ein; rotation of the sleeve 5 in either 38. 3S, direction with `respect to the drive shaft I Will cause the sleeves '49, 4I to rotate in opposite directions with respect to 'the drive shaft I. Upon rotation of the sleeve 5in eitherdirection With respect to the drive 'shaft'l, the gear 42 will rotate at a speed inter- ,me'diate With` respect to the gear 2 and the sleeve 5, sincethe planetary pinions 31, 38 are disposed torotate'at the same speeds With respect to each other, and; because of the difference in the -size of theplanetarypinionS 31, 38 the gear 42;must rotate at a ,speed nearer; the. same: speed :of the sleeve5 than thegear 2. i e 1 y I Suchfian intermediate speed ofthe .gear 43, however,- will ,not .beveifectedfinstead 'thegear 2 will be caused :to :rotate atV arspeedintermediate WithA respect tothe sleeve, 5=andthe-gear 43, since the planetary pinions-51.1 are smaller than the planetary pinions 39: and theegear 2?.'must rotate at a -speed .nearer thesame .speed of the sleeve than the gear 43. ya.; r e' Thus,- it will be fseen, lwith -thei gear 2`rotating ata speed intermediate with .respectto the sleeve 5 andfthegearf43, andthe gearl 42 rotating ata speed intermediate with Y'respect tothe gear 2 and the vsleeve 15,rotation of the' sleeves 4,"4I must, hence, beiin reverse-or opposite directions Withrespect .to eachv other or. 'the 'drive'shaft I, whenever, for any reason the sleeve 5 is rotated in either direction with respect to the drive shaft-1' Y j Y *Adjacent the gear .43; v'coaxially' disposed with respect tothe drive shaft l", is' the pair o f oppos-k ing drums 44, 45, the drum 441 lci'eing "journaled by means of the lbearings 46 embracing the sleeve 48 which extendsaxially from the'drum 44. The drum'f45 kisiflikevvise mounted on thefbearings 4 1 by means of the driven shaft 49, axially vextending from the drum 45 for connecting to'therear Wheels offlfan automobile or some driven machine astheoasemayba# l Means are providedlfor 'connecting thedrums 4=4,.45to the'fdriven shaft49'1for rotation of the drums 44, 45 at different speeds with respect toeach-other. For-Which 'purposeis provided an idler shaft -5IJ upon wlii'chis rigidly affixed a pair of gears 5|,52 by means c fv respective keys 96, 91, the gears 5I, 52 being disposed for respective operative engagementwiththe gears 53', 54. The gears 53,. 54 `are rigidlyy a'fiiXed vtothe sleeve 48 and the driven shaft 49, respectively, by means ofthe keys"94, 95, also respectively, the ratio between the'gears 5'I53 'and` thegears 52, 54 being arranged so' that the drum 44 will rotate at a faster speed With respect to the driven shaft 49 thanv the drum 45, which, in this instance, is integrai with'the driven 'shaft 49. f' Forrotarily supporting the idlershaft'5 by therhousing'Athere isprovidedthe bearings 55 suitably arranged at the ends 'of the idler shaft 5.9. VThe housing .Ai is splitso vas to: facilitate ase semloly-of`V the parts-and is provided With-a suitable number of fastening elements or bolts 51, the splitv inf the housing being arran-ged'tsc as to provide accessibility to the bearings 4, 30, 55. The drive shaft isfurther supported by a pilot bearing-56 provided .fin thedriven shaft -49.

Rotationhf Athe sleeves 49,4I with respect to the drive shaft *.f-is7ei=fected,-whenever, for any reason the sleeve 5 is lcaused to beheld against rotation responsive-to cooperationrbetween the braking member '6 "and the friction member '8. The'sleeve 5 will be caused to rotate with respect t the drive shaft I, thesleeve 48 will be caused to rotate at a speed intermediatefwith respect to the sleeve and the drive shaft I or slower than the drive/shaft I, as has' been described, and the sleeveA4I lwill r rotate at a speed faster than 'the' driveV shaft I since rotation of the drive shaft I must be intermediate with respect to the speed ofthe sleeves 5, 4I. It may Ibe well to here say that the difference in'speed between the sleeves 40, 4I caused by restraining' the sleeve 5 against rotation corresponds tothe difference in speed between the drums 44, 45.

Splined respectively to the sleeves 49, 4I is the pairV of shifting collars 63, l62 arranged so as to be vslida'ble axially with respect to the sleeves 40,"4I,'respectively; Radially disposed in each ofthe shifting lcollars 62, 63 is the grooves 64, the shifting collar 62 being equipped with two series of circumferentially spaced 'plungers 69, 6I, slidably mounted inthe grooves 64- Likewise the shifting collar 63iis equipped with the plungers 65, 66 circumferentially spaced with respect to eachother. Each series'of plungers 60, 6I, 65, 66 is preferablyfour innumber, as best seen in Figures 4 and 5l Internally extending respectively from the drums 64,145'is the's'ets of teeth 58, 59 being the same width as the ends of the plungers 69, 6I, *5, 66. Referring to-Figure 5 it will be noted that'the teeth 58,59 are spaced from each other inthe circumference of the drum, va distance three times the widthof the teeth 58, 59. The plungers 68, 6I,"v 55, 66 Vare each provided with a catch Vas 61 for stopping movement thereof in a radial direction after `they have come to a position for operative engagement with the teeth 58 or 59. Disposed between the plungers 69, 6I, 65, 66 and Vthe inner end of the grooves 64 are the springs 69 foryieldingly urging the plungers 56, 6I, 65, 66 outwardly for operative engagement with the teeth 58, 59. The plungers,V 69, 6I, 65, 66 areiheld in the 'grooves 64 by means of 'suitable washers as'68 beingheld to the shifting collar 622 or 63 by suitable fastening elements 0r screws 1I, as best seen in Figure 6.

" 'The sets of plungers 69,Y 6I 0r 65, 66 are circumferentiallyl disposed with vrespect to 'each other so that when for 'any reason the shifting collar 62 Vor 63 is shifted for meshing engagement of the plungers 69, 6I or 65, 66 with'the teeth 58 or 59,v at least one of the lsets of plungers (58,-'6I or 65,k 66 will be disposed for meshing engagement with theteeth 58 or 59, and are further*disposed circumferentially with respect to each other so that the sets of plungers 68, 6I or 65,` 66 are disposed for operative engagement with the teeth 58 or 59 in opposite directions with respect to each other.

' As will be noted by referring to Figure 8, each of thesets of teeth 58, 59 are formed at an angle suitableso that either one of the sets of plungers 69, 6i or 65, 66 carried'by the shifting collar 62v or 63 in'being shifted vlaterally for meshing engagement with the teeth 58 or 59, will be caused to move inwardly against pressure of the springs 69, in case they are not circumferentially disposed with respect to the teeth 58 01159 for meshi ingengagement therewith. 'It will be 'clear that in case either one of the sets of plungers 60,.-6I or 65, 66 are forced-inwardly caused by failure to mesh with the -teeth 58* or 59, vthat thev 'setof plungers 60, 6I or 65, 66, which does mesh with theteeth 58 or 59, will take up only one :third of the actual space between the teeth '58" or 59, lso that when driving engagement vdo'es'occur'between the shiftingfcollar 62 or l63 and the teeth 58 0r 59 that the other set of plungers 60, 6I 'or 65, 66 will, then -be permitted to fall between the Yteeth'58 or v59 for meshing engagement therewith. 1

vThe shifting collars 62, 63 overlap andare Aconnected to each other by `Vmeans 'of a circumferential groove 10 provided in the shifting `collar` 63, a pair of threaded membersor screws 85 be? ing mounted in the shifting collar 62 and extending outwardly for operative engagement with the groove 19, whereby shifting col1ars`62,` 63ja're free to rotate'with respect to each other but are not free for independent movement axially with respect to each other. Y

Mounted upon the sleeve 48 is the shifting collar 12 provided' with the rcircumferential groove 13. Axially extending from the shifting collar 'I2 is a pair of integral studbolts 14, 15 extending through the holes 16 in the drum 44. Provided in the shifting co1lar'62' is the circumferential groove 88 in which is mounted a suitable snap ring member 11 provided withthe holes 18 for -receiving the ends of thefstud bolts 14, 15 so that the shifting collars *12,A 62 lare free to rotate with respect t'oeach` other and are not shiftable axially with respect to eachother.

Integrally disposed with respect tothe housing A is the stud-bolt 19 upon which` is swingably connected the link `being arranged with a pair of arms 82, 83 provided on each end respectively with the integral studs 86, 81 disposedfor operative engagement with the groove 13. Included by the arm 82A is the integral studA 8l disposed for operative engagement with the groove- 33 ofthe camshaft 29, the groove 33 'being providedwith a prole suitable for shifting the shifting collar 12, and, hence, the'shiftin'gcollars 62,- 63 vfor purposes now appearing. Such shifting of the shifting collars 62, 63 will cause the plungers 69, 6I and the plungers" 65, 66 to be shiftedffor operative engagement alternately with either the teeth 58 or 59. "For, it will be noted, rotation of the cam shaft 29 ina clockwise direction will cause the plungers 65, 66 to b e shifted from engagement with. the teeth 58 to a position intermediate with respect to the teeth 58, 59, while the plungers 60V, 6I are being shifted for operative engagement with thev teeth 58.

YFurther rotation of the camshaft-'291m the clockwise direction will cause the plungers 65,' 66 to be shifted for operative engagement with the teeth 59 while the plungers 69, 6I assume the positien intermediate with respect to the teeth 58 59. vFurther rotation of thecam shaft 29 in the clockwise direction will find the camf shaft 29 rotated one revoluion in this direction, the plungers 65, 66 will be shifted'out of engagement with the teeth 59, while, at the Sametime the plungers 69, 6I will be shiftedffor'operative en gagement with 'the teeth 59. The clockwise direction of rotation'of the'cam shaft 29 is viewed from control wheel 3l end of the cam shaft 29. Thus, contro-lling'y of they ratio between the drive shaft I and the driven shaft 49 is effected by rotation of the control wheel 3l, which cause the sleeve to be alternately' restrained-against rotation iorndriven by thedrive sha-ft ll for intervals duringisom'e'of which the plumes-ers Vtik lil or 5:,.t5are alternately shifted'into and v out of engagement with 'the 'teeth 1.58 or 59 for driving engagement betweencne or the otherfof the sleeve #9,41 and one-or the 'other of the drums M, llf5. Such shifting of the :plungers 39 6:1 or 155; 56 into and fout offengagement with the teeth 58, 59, ,it will Kbe understood, being effected while there is substantially no movement there# between, though, a slight `amount Aof'diiferen'ce in speed might, in some instances, facilitate shifts ing of the shifting collars 62, 63.. l

(Actual speed changes between the 'drive `shaft l and vthe driven shaft 49, however, occur :responsive fto speed changes of the sleeve 5'. The mechanism which includes 'the planetary pin-ions 31,38; 39, the gears-2, 42, '43 vand the shifting 'elements connecting the sleeve-49 or f4l to the drum 44 or 45 in sequence to alternate speed variations ofthe sleeve 5, convert :such variations of 4the sleeve into :unidirectional speed changing response between the drive sha-ft l and the 'driven shaft 49.) Y 1 'Ilhe transmission is susceptible to many fand varied applications which include installations in' tractors, automobiles, trucks, and various machine tools. Inthese installations variations in design abe vin order to fget full advantage from the-transmission unit, Ibut in most cases-the motor or driving spindle, as the case may be, is connected either ydirect-ly or through slome rsuit able means to the drive shaft ll, the driven shaft 49 being connected, likewise, in a suitable `manner tothe rear wheels'of some vehicle, la tool, orsomelother machine. 'g :.Let it be supposed, for example, that thetransmission unit is being used to drive amachine tool in anindustrial application, in which case, 4the drive shaft l is connected to the -niotor 'and the driven shaftV 49 is connected to tool spindlein any suitable manner. Referring to Figure 1 it will Vbe noted that the'fplungers nt5, 66 are in mesh 'with the Vteeth 58 of the drum '44, and the shifting collar 9 is disposed for operation -of Ithe friction member 8 for cooperation withthebraking member 6. So, under these conditions the torque is transmitted fromthe drive shaft I through the gear 2 to the planetary pinions 31, 38, the sleeve 10i-being connected by means of the plungers-, $6 to the drum '44, hence, to the driven-shaft 49,y 'by means of the gears 5I, 52, 53, 54. v Now, let'it be supposed that it should become necessary-to increase the speed of the driven shaft 49, whereupon, the control wheel 3l will be turned, necessarily, in `a clockwise direction .(viewing yfromcontrol Wheel 3| end of camshaft 29).- This `clockwise -directionof rotation causes the arm 422 to be .oscilla-ted until the roller has .been forced from the cam face- 21 to the cam face 26 -for shifting the shifting collar 9 for cooperation between the friction member 1 and the clutching member 3 for unison speed response of the sleeve 5 to the drive shaft l. SucheJ shifting `of the shifting collar 9 is effected by the time the control wheel 3| has turned one quarter revolution.

This change in speed of the sleeve 5 with respect to the drive shaft I, will result, then, in

an increasein speed of the drum 44 and, hence, the driven shaft 49, since the sleeve 40 was rotating at a speed slower than the drive shaft Lor intermediate with respect to the sleeve 5 andthe drive sh-aft l, Joefore thechange in 'speed of the sleeve 5 occurred. 'The cam shaft 29 has.' thus, been rotated one quarter turn with .-sub stantially no 4movement, of the shifting collar "I3 being effected by the profile of the fgroove 33, best seen in Figure 9.

vDuring this interval of quarter vturn of the control wheel 3|., there has been effected a substantial v speed change Vbetween the v'drive shaft 1 and the driven shaft 49.- Further rotation of the'control wheel ,3i will cause the groove 33 to shiftthe shifting collar Y12 for meshing :engagement of the'plungers 6U, 61 with the teeth 58 of the drum 44, vthe plungers 5, 65 v'being shifted out of engagement with the teethY 58 `at the Sametime. It'shoul'd be noted `that the sleeve 40,- v4| will be rotating at the same speed, so :that shifting'of the plungers vlill, 61 and 5, Giiin and out Yof engagement with the teeth 58 is effected while thereis substantially no movement therebetween. y

After the 'shifting collar 12 has been shifted for driving :engagement between the sleeve dil and thefdrum 44, before the vroller Z'Efhasibeen forced from the cam `face 264:0' the-"cam face 2l, the control wheel A3l is rotated to a full half turnthe roller 25` is forced from the 'cam face 2B to the cam face 21, and the shifting collar` '9 is again shifted for 'cooperation between `the friction member -8 :and the 4braking member '6 for effectively restrainingthe 'sleeve y5 against rotation. The speed of the driven shaft 48 is, thus, effectively increased, since the sleeve M vmust rotate faster than the drive shaft I;

Because of the -efliciency .of the transmission care should be taken at this position of half turn of the control wheel 3i to rotate the control wheel 3| until the vplungers B5, 66 are shifted into meshing engagement with rthe teeth 59 of the vdrinn 45. -Such a shifting of the plungers 65, 66 into meshing engagement with the teeth 59 .is effected while there-is `substantially 'no movement therebetween, the span of difference in speed between the sleeves '49, A41 being equal to the difference in speed between the :drums lM, t5, as has been explained.

At thisV position with the 4plungers G5, 66 in meshing engagement with theel-rum 45,the 'control wheel 3|is rotated to a `full three quarters turn and the roller l25 is lagain forced from 'the cam face 21 to the camA face l26 for cooperation of the friction member 'l with the clutching member 3 and thedriven shaft AI9 is'againeifectively increased in speed. Y

After this position of three `quarters -tu-rn of the control wheel l3l has been reached, through the interval during which the Lplungers `66 were in meshing engagement with the teeth '59 ofthe drum 45, further 'increase in speed A0f the driven shaft-49 -is eiectedby rotation of the control wheel 3l, whereupon, the plungers 15D, lfl 'will be shifted into meshing-engagement with the teeth 59 of the drum -45 .and further rotation of the control wheel 3i will cause #the sleeve 45 to be effectively restrainedagainst rotation by the braking member 6. This latter position vof one full turn of the control wheel 3l, thus'reached with the sleeve 4I rotating at its maximum speed and connected to the drum 45 `:is the maximum speed of the driven shaft 49 possible' to attain.

Thus it will be :seen my invention accomplishes its object. The variablespeed means whichA includes the braking member 6, ythe clutching member-3, and the friction members Il, V8 Jare op- "u, It will-be .-understood that if desired,

:2;,ss'eg9v4 limitstogive the desired overall speed change.

The torque is to alarge extent-carried by' gears yinstead of theusual friction driveswhich vhave 1 always heretoforebeen required.

types ofdvariable.speedimeans howl-being sold on z the market '.couldibe.4 used andsubstitutedfor the .variable speed meanszdscribed .-inl these? specifications.. ori various .1 compounding arrangements using the. principles of .this variable speed transmission could be made. Likewise otherchanges Sand modifications in theform,l construction, arrangement, and combination of the several'parts of thevariable speedtransmission may be made and' substituted for .those herein shown and de.- scribed withoutz departingffrom the nature and principles :of my invention.= 'i

.Having thus described' Jmyf' invention,l what AI ,claim anddesire to secure -by yLetters Patent is: AIn a variable speed transmission of the kind described, in combination, -a drive shaft, a driven shaft, a. revolvablemember. mounted for indevarious 'onefor the otherof said-first and/second sleeves -to-said:.driven shaft, and controlling means `adaptedcboth to regulate saidA variable speed 'nieans repeatedlybetween its speed changing Flimits and to operateY said shiftable means.

v3.In a` variablespeed transmission-of the kind :revolution withrespect-to. said drive and driven shafts, a gearing :arrangement adapted to conn'ect one` of said shafts and. said Yrevolvable member to said pair `of revolvablemembers and, in amanner to reverse the direction of speed :change: of said pair of revolvable members with respect to each other responsive to speed changes .by saidvariable speed means-first and second shiftable" collars connected. respectively vto said .pair' of revolvablemembers for rotation therependent revolution with respect to said drive and driven shafts, braking meansadapted to vrestrain said revolvable memberfagainst rotation, clutch-l ing meansdisposed for clutching Aengagement between said revolvable memberand one ofsaid shafts, a link swingable for .alternate operation of l said braking andclutching. means, for varying the speed of said revolvable member;;-.said link including-"a pair of cam faces oppositely disposed with respect to each other, a swingable member including an arm, cam follower means splined to said swingable member against independent rotation and yieldingly held against one or the other o-f said pair of cam faces for operation of said link by said swingable member, a pair of revolvable members mounted for independent revolution with respect to said drive and driven shafts, a gearing arrangement adapted to connect one of said shafts and said revolvable member to said pair of revolvable members and,

-in a manner to reverse the direction of speed change of said pair of revolvable members with respect to each other responsive to speed changes of said revolvable member, mechanism includingV means shiftable for alternately connecting one or the other of said pair of revolvable members to the other of said shafts, and controlling means adapted both to actuate the arm of said swingable member for operative engagement between said cam follower means and -one or the other of said cam faces for operation of said link 'and to operate said shiftable means.

2. In a variable speed transmission of the kind described, in combination, a drive shaft, a driven shaft, a sleeve mounted for revolution bodily about the coaxis of said drive shaft, variable speed means for varying the speed of said sleeve, rst and second sleeves mounted for revolution eoaXially with respect to said first named sleeve, said drive shaft and said first and second sleeves each affixed to a gear wheel respectively, first, second and third series of planetary pinions disposed for meshing engagement respectively with said gear wheels, said first, second and third series of planetary pinions being disposed for rotation of the pinions in each of said series at the same speed with respect to each other and, being carried by said first named sleeve, said second series of planetary pinions smaller than said rst series of planetary pinions, said third series of planetary pinions larger than said first series of planetary pinions, mechanism including means shiftable for alternately connecting vwith and.. beingshiftablevaxially with respect to said pair of sleeves,- apair of drums connected to .the other ofv said shafts for rotation at different speeds with .respectto'eachother, each of said drums including inwardly-extending sets of teeth, two sets;` of ...plungers carriedby each of said shiftable, ,collars-,- andiyielding held in position forpperative engagement with said` sets of teeth, said.se,t s offteeth.adapted =t o `forcegeither; one jofsaid setsqof l plungers .out vof position fory engagement in case of failure to mesh therewith, each of said two sets of plungers circumferentially disposed with respect to each other so that at least one of said sets of plungers will be disposed for meshing engagement with said sets of teeth and, being disposed for operative engagement with said setsof teeth in opposite directions with respect to each other, and controlling means adapted both to regulate said variable speed means repeatedly between its speed changing limits and to shift said first and second shifting collars for alternate meshing engagement between one or the other of said two sets of plungers and one or the other of said sets of teeth.

4. In a variable speed transmission of the kind described, in combination, a drive shaft, a driven shaft, a revolvable member mounted for independent revolution with respect to said drive and driven shafts, variable speed means for varying the speed of said revolvable member, a pair of revolvable members mounted for independent revolution with respect to said drive and Ydriven shafts, a gearing arrangement adapted to connect one of said shafts and said revolvable member to said pair of revolvable members and, in a manner to reverse the direction of speed change of said pair of revolvable members with respect to each other responsive to speed changes by said variablel speed means, elements connected to the other of said shafts at different speeds with respect to each other, mechanism including means shiftable for alternately connecting one or the other of said pair of revolvable members to said elements for respective intervals of operation of said elements, and controlling means adapted both to regulate said variable speed means repeatedly between its speed changing limits and to operate said shiftable means.

5. In a variable speed transmission of the kind described, in combination, a drive shaft, a driven shaft, variable speed means connected to one ot saidishaitsmeans adaptedzto; alteignate speed changes, on saidivariable speedi means, and: .mechansmsactuable for converting alternate. speed changes ofsaid variahlezspeedi. means; into. undirecticnals; speed.. changing response Ybetween 4said ,drive and'. drieen. shafts, said-mechanism Y including-n pair of revolvablemembers mounted for independentlrenolution with respect ,.to. said; drive and Adriven shafts,y a .gearing .arrangement adapted to connect fsadsvariable speed means to I .said neeolvablegmembers and,r in. a manner to reverse the dirlectionnc-fwspeed change' of Asaid pain off revolt/able members, with respect.v to. each other responsive :tdsaijdi variable speed means, members.- cdnnected; to'. the. `other of said; shafts fox; rotation. at dineren-b speedsvwith respect ,to

.each other, mechanism including meansv shift.- able fon alternate drivingengagement between `enclos the. other ofvsaidsf paii'- die revolyable .mem-.- vber-s; ands amt one. on said: last named members,

speedsdetermined` by said variable; speed means endg ini-a mannento reverse the direction of speedchange of: said pain oiiirevolvable members with- Vrespectto each othen responsivey tov said .vmziablet speed means, members connected to tneothen cfsed; shaits: rois-rotation at, different speeds; with resneqtltoiech; other, mechanism including meansshjtablef ien alternate driving engagement betweeneone; .oethe other' of said nain ci. -revolvsble members and any one on said lest: named members, and contnoliingv means adeni'efkbdtn .tc regulate. speed ci said unable spendiV means repeated-lizAx betweenits speedi changinglimits. and tQ; actuate. said shiftable, means.

. 'ljnamariablespeeds transmission ot'. the kind described. in combination, adnive shaft, e. driven shaft, vasiable. speed: means, means actuable@ tor affecting; alternate. speect'changes of:l said-'I vari- .abie A,speeds means; mechanism adapted toY convert alternate speed changes; off said' cariable speed-z into; unidirectional speed changing response` between said drive andi driven.; shafts, saids mechanism: including ai :pair-f of' revolvable membensconnected to4 one. of`r said' shafts at speeds'determined by;V saidi.variabe= speed means and, fon resnonsefto,7 said; variable speed. means in. opposite directionswith respect to each. other, andi means. shiftabl'el for alternate driving engagement; betiizeen.` one.I or the. other oil said reizolizablefmembers andt the othen of: said: shafts, and controllingmeans. adapted." both to; actua/te saL-id; aotuable. meansff.:indito shift. saidY shiftable 3.0 means;

VERNON?. KINSER. 

